[ARM] Convert asm/io.h to linux/io.h

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-at91/at91x40_time.c b/arch/arm/mach-at91/at91x40_time.c
index 869b5e2..dfff289 100644
--- a/arch/arm/mach-at91/at91x40_time.c
+++ b/arch/arm/mach-at91/at91x40_time.c
@@ -23,8 +23,8 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/time.h>
+#include <linux/io.h>
 #include <mach/hardware.h>
-#include <asm/io.h>
 #include <asm/mach/time.h>
 #include <mach/at91_tc.h>